v2.3.0: fixed cases where pushing could fail to apply and freeze

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/effects/Pushing.java

@@ -64,17 +64,19 @@ public class Pushing extends Actor {
 	
 	@Override
 	protected boolean act() {
-		if (sprite != null) {
+		Actor.remove( Pushing.this );
+
+		if (sprite != null && sprite.parent != null) {
 			if (Dungeon.level.heroFOV[from] || Dungeon.level.heroFOV[to]){
 				sprite.visible = true;
 			}
 			if (effect == null) {
 				new Effect();
 			}
+		} else {
+			return true;
 		}
 
-		Actor.remove( Pushing.this );
-
 		//so that all pushing effects at the same time go simultaneously
 		for ( Actor actor : Actor.all() ){
 			if (actor instanceof Pushing && actor.cooldown() == 0)